Bicycle-pump



B. BLACK AND A. COOK.

BICYCLE PUMP.

APPLICATION FILED ocr. 3o, 1911.

Patented Oct. 2l, 1919.

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UNITED sTATEs PATENT OEEioE. p L

BENJAMIN BLAGK AND ALBERT COOK, OE EEOOKLYN, NEW YORK.

EIcYcLE-PUMP.

Specification of Letters Patent. l Patented Oct. 19.19.]v

Application led October 30, 1917. Serial No. 199,333.

To all inkom z5 may Concern Be it known that we, BENJAMIN BLACK and ALBERT Coon, citizens of the United States, residing at Brooklyn, in the county of Kings and State of New Yorlnhave invented certain new and useful `Tmprovements in Bicycle-Pumps, of which the following is a specification.

This invention relates to pneumatics and more particularly to pumps.

The object of the invention is to so construct a bicycle pump that it will form a part of the supporting frame of the vehicle and be always in convenient position for operation and thereby perform the double function of a frame member and an inflating device.

Another object is to so construct a device of this class that the plunger rod may be adj ustable to permit the height of the seat post to be varied.

lVith the foregoing and other objects in view, wliic-li will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings Figure 1 represents a side elevation of a portion of a bicycle frame showing this improved pump applied,

Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1, and

Fig. 3 is a transverse section taken on the line 3 3 of Fig. 2.

In the embodiment illustrated a bicycle frame F of ordinary construction is shown having the usual upright seat supporting standard 1 which is usually and is here shown made hollow as are the remaining members of the frame to provide for lightness. This hollow upright 1 is cylindrical in form, being closed at its lower end and open at its upper end, the lower end supporting the pedals P in the usual manner. A substantially L-shaped seat post 2 is mounted on and forms a closure for the upper end of the cylinder 1. The upright member 3 of this seat post has a bore 4 eX- tending longitudinally therethrough to receive a piston rod 5.k This piston rod 5 has a hand grip 6 at its upper end such as is usual indevices of this character and mounted thereon within theJ cylinder is a piston 7 which may be of any suitable or desired con- Y struction, being here shown in the form of a leatherwasher secured to the rod 5by a nut 8 between which and a shoulder l9 on said rod it is clamped, the end 10 which carries said piston being here shownreduced. This piston rod 5 is made in two sections 11 and l2 the adjacent ends of which are threaded and connected by an internally threaded sleeve 13 which provides for the adjustment of the length of the piston rod 5 so that the seat post 2'may be varied in height, a )am nut 13 being applied to the section 11 and engaged against the sleeve 13 to secure the parts against relative movenient.

A hose connection in the form of a nipple li of ordinary construction is carriedy by the lower end of the pump cylinder and with which the hose which connects the pump with the tire to be deflated is designed to be connected, said hose not being here shown. y t

Vhen the seat, not shown, is in position on the horizontal arm 15 of the seat post, the head or hand grip 6 of the piston rod 5 will be disposed at the rear of the seat in convenient position for operation when the pump is to be used. Y

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It will thus be seen that by so constructing the frame member 1 it performs the' double the invention appertains and while we have described the principle of operation of the invention together with the device Which we now consider to be the best embodiment thereof, we desire tohave it understood that the device shown is merely illustrative and that such changes may be made as are within the scope of the claimed invention.

We claim In combination, a tubular rear upright member olf -a bicycle frame, saidY tubular member having' an opening' at its lower end,

a hose connection inserted in said opening,

,x a seat post inserted in the upper end of said 5 tubular member and having a central opening extending therethrough, a headed rod operating in said opening of the seat post, said rod having its lower end threaded, a sleeve engaged upon the threaded end of 10 said rod, a threaded member engaged on the opposite end of said sleeve, a j am nut engaged upon said second member to bear against the sleeve to retain the parts againstrelative movement, said Second threaded member having a reduced lower end, a pis- 15 ton applied to said reduced end, and a nut engaged upon said reduced end to secure the piston in place. Y

In testimony whereof We aiiX our signaf tures in presence of tWo Witnesses.

BENJAMIN BLACK. ALBERT COOK.

Witnesses:

Jos. SoLo'rovsKY, G. LOEHMAN,

copie: of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C." 

